The best advice for preparing to teach a class in Zoom is to practice beforehand! We highly recommend practicing with a family member or friend before attempting to use the tools in a live class.
This is what your Zoom tool bar looks like if you're the only person logged into a meeting as the host.
View this article created by Zoom, it'll guide you in navigating your Zoom toolbar as a host or cohost: Using host and co-host controls in a meeting